What are four common types of sealing products applied to wood surfaces?

• A. Shellac, varnish, lacquer, and sanding sealers.
• B. Sealants, paints, stains, and varnishes.
• C. Water-based, oil-based, solvent-based, and epoxy.
• D. Wax, oil, polyurethane, and acrylic.

Answer: (A)

Wood sealing products are used to create a protective barrier and control how subsequent coatings soak in. The four common sealers are shellac, varnish, lacquer, and sanding sealer. Shellac is a fast-drying sealer that blocks bleed-through and knots and sands easily, making it a versatile undercoat. Varnish forms a durable film that protects the wood and helps even out absorption, giving a reliable seal before topcoats. Lacquer dries very quickly and sands to a smooth surface, providing a clean seal that works well with subsequent finishes. Sanding sealer is specifically designed to fill and seal the grain, so sanding leaves a uniform surface for the final coats.

These four cover the main sealing roles you’ll encounter on wood: quick-drying barrier (shellac), durable film (varnish), fast, smooth-sealing film (lacquer), and pore/grain filling for a uniform base (sanding sealer). Other lists mix items that aren’t all sealers, such as paints or stains (which add color) or generic base categories rather than specific sealer products, so they aren’t as accurate for describing common sealing options.